In the space below, redraw n-butane in this elongated conformation. All C atoms shouldbe drawn in the plane of the paper in a zig-zag to represent the geometry displayed byyour model kit. The hydrogen atoms should be attached to the carbon atoms via dashedand wedged bonds, as in question 4C above, to illustrate the three-dimensional geometryof the structure.27c. Review from question 4 above (fill in the blanks): If molecules contain the sameof each type of atom, but they cannot be made to lookbonds, then they arenumberIdenticalIsomerswithoutUse your model kit to build an isomer of n-butane. After building it, draw the Lewisstructure in the space below. (It is not necessary to represent three-dimensionality inyour drawing.)

zig-zag notation used to represent the 3D molecular structure on a 2D surface. The simple line…

In the space below, redraw n-butane in this elongated conformation. All C atoms should be drawn in the plane of the paper in a zig-zag to represent the geometry displayed by your model kit. The hydrogen atoms should be attached to the carbon atoms via dashed and wedged bonds, as in question 4C above, to illustrate the three-dimensional geometry of the structure. c. Review from question 4 above (fill in the blanks): If molecules contain the same number of each type of atom, but they cannot be made to look without Identical Isomers bonds, then they are Use your model kit to build an isomer of n-butane. After building it, draw the Lewis structure in the space below. (It is not necessary to represent three-dimensionality in your drawing.)

In the space below, redraw n-butane in this elongated conformation. All C atoms should be drawn in the plane of the paper in a zig-zag to represent the geometry displayed by your model kit. The hydrogen atoms should be attached to the carbon atoms via dashed and wedged bonds, as in question 4C above, to illustrate the three-dimensional geometry of the structure. c. Review from question 4 above (fill in the blanks): If molecules contain the same number of each type of atom, but they cannot be made to look without Identical Isomers bonds, then they are Use your model kit to build an isomer of n-butane. After building it, draw the Lewis structure in the space below. (It is not necessary to represent three-dimensionality in your drawing.)

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter6: Alkanes & Alkenes

Section: Chapter Questions

Problem 3E: Using your model of butane (CH3CH2CH2CH3) , complete the following graph of the anglebetween the two...

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Show that the total number of valence electrons for each atom in butane is consistent with the total number of valence electrons represented in the model for butane (pictured)
Draw the Newmann projections of this molecule along the circled bond of this molecule, from the point of view of the eye. You should include and label the syn-periplanar, gauche, anticlinal and anti-periplanar conformations, and whether the conformation is staggered or eclipsed. List these four conformations from most stable to least stable?
How do you account for the difference in energies between the two staggered conformations of 1,2-dichloroethane? How about for the two eclipsed conformations? Draw all four conformations and, on your drawing, indicate sources of strain – torsional, steric (gauche), steric eclipsed.
Using your model of butane (CH3CH2CH2CH3) , complete the following graph of the anglebetween the two Me groups vs. potential energy. a. Label each Newman projection of butane on the graph with the words staggered, eclipsed, gauche, and anti, as appropriate. (Note that some structures will have more than one label.) b. Draw a wedge and dash bond representation of butane in its lowest P.E. conformation.
In the next chapter we'll look at cycloalkanesâ€”saturated cyclic hydrocarbonsâ€”and weâ€™ll see that the molecules generally adopt puckered, nonplanar conformations. Cyclohexane, for instance, has a puckered shape like a lounge chair rather than a flat shape. Why?
Consider the molecule 1-bromo-2-methylbutane. C3 and C4 should be drawn as Et as in theexample. This group is called an ethyl group and can be considered a sphere about twice the sizeof a methyl group. Draw the following Newman projections sighting down the C1C2 bond... a. The lowest potential energy conformation. b. The highest potential energy staggered conformation.
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Citing down the C3-C4 bond, and using the drawings below, complete the Newman projections for all staggered and eclipsed conformations of hexane. Which staggered conformation has the lowest energy? Which eclipsed conformation has the highest energy?
Show the Newman projections for the staggered and eclipsed conformations of ethane ?
How to solve this question? Would the most stable conformation be staggered (and is it gauche or anti? I can't tell), and the least stable be eclipsed? Not sure how to draw these structures.
Using your model, construct an energy diagram to show the variation in the free energy of the molecule as the FRONT ATOM is rotated CLOCKWISE from 0º to 360º in 60º increments. In your energy diagram, you should clearly show the relative energies of each conformer.
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